Voltage amplifier



Sept. 25, 1934. OESTRICHER 1,974,928

VOLTAGE AMPLIFIER Filed June 22, 1955 INVENTOR.

#877530 G Oestr/cker ,BY%Q@W ATTORNEY S Patented Sept. 25, 1934 UNITEDSTATES PATENT OFFICE 1 Claim.

This invention relates to electrical apparatus and more especially to adevice adapted to be introduced into the ignition circuits of sparkignited internal combustion engines.

This device belongs to that class of instruments having for its generalpurpose the voltage amplification of the spark occurring in the usualtype of spark plugs employed in such circuits.

An object of this invention is to provide a spark amplifier of few andsimple parts and construction whereby to make possible the productionand sale of these devices at a reasonable price. 1

Another object is to provide in the voltage amplifier a simple andeasily made electrical jump barrier which is adjustable to any desiredshape.

Another object is to provide a voltage amplifier in which means isembodied to insure physical contact of the interior elements at alltimes and under all conditions.

Another object is to so shape the body of the voltage amplifier that twoor more of such devices can be used together in a minimum of space.

A further object is to provide means to quickly dissipate the heatexternally, as by aid of a metal radiator leading from the interior ofthe device.

Various other meritorious features of my in-' '2-2 of Figure 1,

Figure 3 is an enlarged perspective view of the electrical jump barrier,and

Figure 4 is a partial view of the closure member showing the manner ofexternally dissipating the heat of the interior of the amplifier.

The structure in its preferred form includes a flat cylindrical body 10made of insulative material, a hollowed cylindrical interior 12 ofslightly less diameter than the body, and a closure member 14 for thecompletely shielding the hollowed interior from the outside.

A terminal receiving socket 16 protrudes from the body portion 10 and acontact rivet 18 makes an electrical connection with the interior 12.

Opposite to the socket a contact bolt 20, having a head 22 seated in arecess 23, extends through the wall of the body 10 connecting theinterior with the exterior. A nut 24 tightly secures the contact bolt inplace, and a terminal 26 is loosely screwed on the threaded end of thebolt.

A coil spring 28 .of nearly the same diameter as the hollowed interioris compressly seated therein, several of the individual coils makingcontact with the contact rivet 18. Between the head of the bolt 22 andthe coil spring is an electrical jump barrier generally indicated by 30.As-

shown in Figure 3 this jump barrier comprises an arcuate strip of metal32 about which has been folded insulative tape 34. The adhesive side ofthe tape is pressed against the surface of the metal firmly securing itin place. Any flexible metallic material may be used for the strip, andordinary friction tape may be used for insulatively spacing the stripfrom electrical contact. By

using a strip of flexible metal, the jump barrier 30 can be bent intoany desired shape to conform with the surrounding walls and contacts.

For the purpose of dissipating the heat which may be generated duringthe operation of the device, a coil of wire 36 is mounted around-theclosure member 14 and leads 38 connect the interior of the containerwith the 'coil of wire.

In its use in conventional internal combustion engines, the device isusually placed in the high tension line leading from the coil to thedistributor, the socket and terminal constructed to fit the usualconnections found in this tension line.

Having described an illustrative form of my invention various modifiedstructures will be at once apparent to those skilled in the art andtherefore I do not wish to limit myself except within the scope of theappended claim.

What I claim is:

A voltage amplifier comprising a hollow cylindrical casing of insulativematerial closed at one end and provided with a removable plug closure atthe opposite end, said casing having an integral socket for a circuitterminal projecting radially from its cylindrical wall, a contact withinsaid socket extending through said cylindrical wall into the interior ofthe casing, said cylindrical casing wall provided with a recess formedin its inner fage spaced from said contact, a contact seated in saidrecess flush with the inner surface of the cylindrical wall andextending outwardly through said wall and terminating exteriorly thereofin a threaded extension, an arcuate metal strip shaped to conform to theinner curvature of the cylindrical wall and seated thereagainst bridgingsaid recess and engaging said contact, a layer of insulative tapeadhesively secured over both faces of said metal strip, a multiple coilspring arranged within said casing having a plurality of coils engagingsaid first mentioned contact and engaging said metal strip urging thesame against said second mentioned contact, and a heat dissipating coilarranged between said closure plug and the edge of the cylindrical wallof the casing and having a part extending into the interior of thecasing.

HENRY G. OES'IRICHER.

